Once the Philadelphia region gets past the heat wave, unstable air returns, and the storm door will open through the weekend.

A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir, trapping heat and humidity ...

An "extremely dangerous heat wave" is continuing to scorch a huge area of the eastern United States June 23, affecting tens ...

Sixteen people were sent to the emergency room for heat-related illness following two New Jersey high school graduations ...

Heat puts intense strain on the body, leading to dehydration, exhaustion and potentially deadly heat stroke, in which your ...

NORRISTOWN — A Code Red hot weather emergency declaration in Montgomery County was extended through Wednesday as a heat wave ...

An intense and nearly historic weather pattern is cooking much of America under a dangerous heat dome this week with ...

The high temperature so far at Philadelphia International Airport reached 99, breaking a record high of 98 set last year.

PECO is working to fix outages from last week’s storm. But thousands of customers are without power for A/C as temperatures ...

With a heat wave expected in Philly this week, Bill Henley explains the importance of staying in the shade and avoiding ...

It's oppressive outside today in Pennsylvania, as heat indices may near 110 degrees. When is relief on the way? Here's the ...